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Title: Global patterns and controls of soil organic carbon dynamics as simulated by multiple terrestrial biosphere models. Current status and future directions

Journal Article · · Global Biogeochemical Cycles
DOI:https://doi.org/10.1002/2014GB005021· OSTI ID:1224507
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  1. Auburn Univ., AL (United States)
  2. Northern Arizona Univ., Flagstaff, AZ (United States)
  3. Carnegie Inst. for Science, Stanford, CA (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Climate and Environment Sciences Lab. (LSCE) (France)
  6. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  7. National Inst. for Environmental Studies, Tsukuba (Japan)
  8. Univ. of Illinois, Urbana-Champaign, IL (United States)
  9. Tsinghua Univ., Beijing (China)
  10. Montana State Univ., Bozeman, MT (United States)
  11. National Snow and Ice Data Center, Boulder, CO (United States)
  12. National Aeronautics and Space Administration, Mountain View, CA (United States)
  13. Univ. of Maryland, College Park, MD (United States)
+ Show Author Affiliations

Soil is the largest organic carbon (C) pool of terrestrial ecosystems, and loss from soil accounts for a large pro portion of land-atmosphere C exchange. Due to large pool size and variable residence time from years to millennia, even small changes in soil organic C(SOC) have substantial effects on the terrestrial C budget, thereby affecting atmospheric carbon dioxide (CO2)concentration and climate change. In the past decades, a wide variety of studies have been conducted to quantify global SOC stocks and soil exchange with the atmosphere through site measurements, inventories, and empirical/process-based modeling. However, these estimates are highly uncertain and identifying major driving forces controlling soil C storage and fluxes remains a key research challenge his study has compiled century-long (1901-2010)estimates of SOC storage and heterotrophic respiration (Rh) from ten terrestrial biosphere models (TBMs) in the Multi-scale Synthesis and Terrestrial Model Intercomparison Project (MsTMIP) and two observation based datasets. The ten-TBM ensemble shows that global SOC estimate range from 4 to 2111 Pg C (1 Pg = 1015g) with a median value of 1158 Pg C33 in 2010. Modeling approach estimates a broad range of Rh from 35 to 69 Pg C yr-1 with a median value of 51Pg C yr-1 during 200–2010. The largest uncertainty in SOC stocks exists in the 40–65°N latitude band while Rh differences are the largest in the tropics. All the models agreed that climate and land use changes have decreased SOC stocks while elevated CO2 and atmospheric nitrogen deposition have increased SOC stocks though the response varied significantly among models. Model representations of temperature and moisture sensitivity,nutrient limitation and land use partially explain the divergent estimates of global SOC stocks and soil fluxes in this study. In addition, major sources of uncertainty from model estimation include exclusion of SOC storage in wetlands and peatlands as well as C storage in deep soil layers.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1224507
Report Number(s):
PNNL-SA-106113; 47646; KP1702030
Journal Information:
Global Biogeochemical Cycles, Vol. 29, Issue 6; ISSN 0886-6236
Country of Publication:
United States
Language:
English

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Comparison of effects of cold‐region soil/snow processes and the uncertainties from model forcing data on permafrost physical characteristics journal March 2016
Effects of disturbance on the carbon dioxide balance of an anthropogenic peatland in northern Patagonia journal August 2019
Assessment of Sequestered Organic Carbon and Its Pools Under Different Agricultural Land-Uses in the Semi-Arid Soils of South-Western Punjab, India journal December 2019
The power of language: Functional brain network topology of deaf and hearing in relation to sign language experience journal March 2019
Plant Feedback Aggravates Soil Organic Carbon Loss Associated With Wind Erosion in Northwest China journal April 2019
Unexpectedly large impact of forest management and grazing on global vegetation biomass journal December 2017
The global significance of omitting soil erosion from soil organic carbon cycling schemes journal October 2015
Microbial carbon use efficiency predicted from genome-scale metabolic models journal August 2019
Atmosphere–soil carbon transfer as a function of soil depth journal July 2018
N-P Fertilization Stimulates Anaerobic Selenium Reduction in an End-Pit Lake journal September 2017
Tropical forest soil carbon stocks do not increase despite 15 years of doubled litter inputs journal December 2019
Quality of life in primary progressive aphasia: What do we know and what can we do next? journal June 2018
Missing pieces to modeling the Arctic-Boreal puzzle journal February 2018
Matrix approach to land carbon cycle modeling: A case study with the Community Land Model journal November 2017
Carbon cycle confidence and uncertainty: Exploring variation among soil biogeochemical models journal November 2017
Long-term terrestrial carbon dynamics in the Midwestern United States during 1850-2015: Roles of land use and cover change and agricultural management journal February 2018
Large uncertainty in carbon uptake potential of land-based climate-change mitigation efforts journal April 2018
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Childhood hearing impairment and its associated factors in sub-Saharan Africa in the 21st century: A systematic review and meta-analysis journal January 2020
Self-Reported Hearing Loss and Pure Tone Audiometry for Screening in Primary Health Care Clinics journal January 2018
Plant Seed Proteins: Chemistry, Technology and Applications journal August 2018
The Understanding of Scalar Implicatures in Children With Autism Spectrum Disorder: Dichotomized Responses to Violations of Informativeness journal July 2018
Assessment of Spatial Representativeness of Eddy Covariance Flux Data from Flux Tower to Regional Grid journal September 2016
20th century changes in carbon isotopes and water-use efficiency: tree-ring-based evaluation of the CLM4.5 and LPX-Bern models journal January 2017
Stable isotopic constraints on global soil organic carbon turnover journal January 2018
Global soil–climate–biome diagram: linking surface soil properties to climate and biota journal January 2019
Ideas and perspectives: Carbon leaks from flooded land: do we need to replumb the inland water active pipe? journal January 2019
Global spatiotemporal distribution of soil respiration modeled using a global database journal January 2015
Disequilibrium of terrestrial ecosystem CO2 budget caused by disturbance-induced emissions and non-CO2 carbon export flows: a global model assessment journal January 2019
Data-mining analysis of the global distribution of soil carbon in observational databases and Earth system models journal January 2017
A vertical representation of soil carbon in the JULES land surface scheme (vn4.3_permafrost) with a focus on permafrost regions journal January 2017
Coupling the Canadian Terrestrial Ecosystem Model (CTEM v. 2.0) to Environment and Climate Change Canada's greenhouse gas forecast model (v.107-glb) journal January 2018
Evaluating the E3SM land model version 0 (ELMv0) at a temperate forest site using flux and soil water measurements journal January 2019
Greater soil carbon stocks and faster turnover rates with increasing agricultural productivity journal January 2017
Toward inventory-based estimates of soil organic carbon in forests of the United States journal April 2017
Spatial Predictions and Associated Uncertainty of Annual Soil Respiration at the Global Scale journal December 2019
Evaluation of simulated soil carbon dynamics in Arctic-Boreal ecosystems journal February 2020
The power of language: functional brain network topology of deaf and hearing in relation to sign language experience posted_content June 2018
Global spatiotemporal distribution of soil respiration modeled using a global database journal January 2015
Global satellite-driven estimates of heterotrophic respiration journal January 2019
Description and Validation of the Simple, Efficient, Dynamic, Global, Ecological Simulator (SEDGES v.1.0) posted_content May 2017
20th century changes in carbon isotopes and water-use efficiency: tree-ring-based evaluation of the CLM4.5 and LPX-Bern models text January 2017
Stable isotopic constraints on global soil organic carbon turnover posted_content September 2017
Assimilation of repeated woody biomass observations constrains decadal ecosystem carbon cycle uncertainty in aggrading forests: CONSTRAINING BIOMASS AND SOIL C CYCLES journal March 2017
Description and validation of the Simple, Efficient, Dynamic, Global, Ecological Simulator (SEDGES v.1.0) journal January 2018

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